Ice-cream freezer.



M. A. ROLLMAN.

ICE CREAM FREEZER.

APPLICATION FILED AUG.17, 190B Patented Dec. 12, 1911.

3 SHEETS-SHEET 1.

M. A. ROLLMAN. IGE CREAM FREEZER. APPLICATION FILED AUG. 17, 1908.

Patented Dec. 12, 1911.

3 SHEETS-SHEET 2.

Elvwzntoz Q/Vihwomo COLUMBIA PLANDGRAPH CO.,WASH1NGTON, 04 c4 M. A.ROLLMAN. 1GB CREAM FREEZER.

APPLICATION FILED AUG. 17, 1908.

Patented Dec. 12, 1911.

3 SHEETSSHEET 3.

Elvwentoz witnesses TED STATES PA FEM.

MICHAEL A. ROLLMAN, OF MOUNT JOY, PENNSYLVANIA, ASSIGNOR TO RICHMONDCEDAR WORKS, OF RICHMOND, VIRGINIA, A CORPORATION OF VIRGINIA.

ICE-CREAM FREEZER.

Specification of Letters Patent.

Patented Dec. 12, 1911.

To all whom it may concern:

Be it known that I, MICHAEL A. RoLLMAN, a citizen of the United Statesof America, and a resident of Mount Joy, in the county of Lancaster andState of Pennsylvania, have invented certain new and useful Improvementsin Ice-Cream Freezers, of which the following is a full and clearspecification, reference being had to the accompanying drawings, inwhich- Figure l is a perspective view showing the manner of attachingthe gearing frame to the tub; Fig. 2 is a plan view thereof partly inhorizontal section; Fig. 3 a vertical sectional view of the freezer;Fig. 4 is a detail perspective view of the hinge plate or clip; Fig. 5is a perspective view in detail showing the gearing frame and the casingdome separated; and, Fig. 6 is a detail vertical sectional view showingmore clearly the manner of hinging the frame to the tub.

The object of this invention is to simplify and cheapen as well as tostrengthen the con struction of the freezer and it consists of certainnovel features of construction and arrangement of parts hereinafterdescribed and claimed.

Referring to the drawings annexed by reference characters, a designatesthe main gearing frame or support which consists of a flat strip ofmetal such as steel bent transversely at b, midway its length, the twobars or plates thus formed being separated from each other but rigidlyconnected together by suitable cross-stays c and d, the two lattercross-stays being of approximately the same width as the'bar a and beingriveted at its ends thereto, the rivets 6 being integral with thecross-stays and extending through the two members of the main bar. Inthis way a rigid light frame is constructed which is less expensive thanthe usual cast frame.

The drive shaft 7 is journaled in the cross-bars cl, and the drivinggear on this shaft is geared into the dasher driving gear 71 whosevertical shaft is journaled at its lower end in a transverse plate 2'and at its upper end in a tubular bearing depending from the gear casingj. The shaft of the upper gear engages the squared end of the scrapershaft is in the usual manner in triple motion freezers, while the gear 9engages in the usual manner in a gear formed on the can cover.

The supporting bar or plate 2' has its shouldered or tenoned ends lengaging in recesses in the opposite bars of the frame, so that this baris held in place and is supported by the frame. Midway their length theside bars of the frame are bulged outwardly to receive between them thedepending rim of the hemispherical casing j, and to rigidly fasten thecasing to the frame a series of rivets m are passed through the framebarsand the casing at suitable points. To more securely brace the casingan annular flange a is formed thereon at a point where it will bear uponthe upper edges of the curved portions of the frame bars. I preferstamping or drawing the casing out of sheet metal, as shown, the bearing71. for the upper end of the shaft of the inner gear being formed byforcing inwardly a portion of the metal casing, as shown. The hole thatis formed in the top of the casing is preferably closed by a sheet metaldisk 0 whose edges are crimped into the casing dome at p. In this way arigid and light and inexpensive gear casing is provided.

It will be observed that the gearing frame is set down in notches cut inthe rim of the tub, the notches being sufliciently deep to bring theupper edges of the frame bars approximately flush with the rim and thenotches also being sufliciently wide to closely embrace the outer sidefaces of the frame bars. In this way the frame is braced and protectedsufficiently on all sides to greatly reduce breakage in handling andtransportation. Another advantage of thus letting the frame down intothe tub body is that with a given height of freezer, measuring from thebottom of the tub to the top of the gear casing, a larger ice space isprovided above the top of the can; this is important in that in aneffective freezer space must be provided to pack the ice on top of thecan as the cream in the top of the can is the most difficult to freezereadily.

As is usual, a suitable locking device or hook g is provided at theouter or bent end of the frame, the bent or rounded end of the frameprojecting beyond theexterior of the tub. This outer end of the frame ispreferably set down into two notches formed in the rim of the tub, asshown, so that the upstanding portion a" of the stave between thenotches forms in connection with the outer stay-rod c a sort of stop toprevent endwise shifting of the frame in transportation and operatingthe freezer; but it is obvious that if desired I may cut out thisportion 7 entirely, the same as shown for the inner end of the frame.This inner end of the frame is hinged to the tub in any suitable mannerbut I prefer the device shown, which consists of a metal clip fittingover that portion of the tub rim forming the bottom of, the notch andhaving its depending inner and outer portions 8 and t fastened to therespective faces of the tub wall by suitable screws. Projectingoutwardly from this clip. are a pair of separated hooks a, which hooksextend outwardly and upwardly and inwardly, their inner free extremities7) terminating approximately in vertical alinement with the main plate25. The bends in the hooks are preferably angular, as shown, and theywork through a pair of openings formed in the inner cross-stay (Z. Thesehooks when engaged in the openings in the cross-bar form a loose hingeconnection which when the frame is down 011 the tub assists in holdingit rigidly there and which when the frame is swung upwardly to avertical position as shown in Fig. 6, looks the frame to the tub. Thishinge connection permits detachment of the frame but to detach it theframe must be adjusted to a special angle with reference to the top ofthe tub, it being thereby impossible to detach the frame while it iseither down on the tub or swung up to its vertical position. It issupported in its vertical position by the handle on the drive shaftstriking against one of the clip plates t, as shown in dotted lines inFig. 6. Then the frame is down on the tub the notches w in the loweredges of the frame bars engage over the upper edges of the adjacent clipplate t, and thus assist in preventing endwise dislodgment of the frame.

It will be observed that the frame construction I have shown anddescribed is eX- ceedingly light and rigid as compared with the usualcast frame, and besides may be manufactured at a lower cost. It isespecially valuable in that it enables the parts to be standardized andinterchangeably used for the various types (triple motion, doublemotion, and single motion) of freezers. Owing further to the strongconstruct-ion of the frame and the manner in which it is set down in thetub frame, breakage in shipping is entirely done away with.

The paddle shaft a: is journaled in its upper end in the uppercross-head y of the scraper frame in the usual manner and its lower endhas a cylindrical boss 2 formed on it on which is journaled thecross-bar a at the lower end of the scraper frame, an annular flange 12being formed on the paddle shaft to engage the upper surface of thecross-bar. The parts are locked together by vertical frame bars 0 whichare preferably constructed of steel and are riveted to suitable lugs onthe cross-bars y and a. In this manner, that is by employing separaterods 0 to connect the cross-bars of the scraper frame and by providingthe paddle shaft with the shoulder Z), the dasher appa rat-us isassembled in a simple and efficient manner, avoiding the use of lockpins and other devices to hold the paddle shaft within The paddle shaftis the scraper frame. locked dlrectly to the can by means of anupstandlng angular stud cl wh1ch engages an axial angular recess in thelower end of r the paddle shaft so that the paddle shaft will rotatewith the can as is usual in triple motion freezers.

lVhere the term sheet metal is used in the specification and claims itwill be understood that I use that term to define that the parts of myframe are made of rolled metal as distinguished from cast metal, itbeing one of the objects of my invent-ion to do away with the casting ofthe frame by constructing it of bars or plates made by the rolling orequivalent method so that the frame may have great strength incomparison with its weight and be practically nonbreakable under any ofthe ordinary strains of transportation and use.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In combination with a. tub having notches formed in its rim atdiametrically opposite points, of a gearing frame bodily fitted down insaid notches and engaging the sides thereof, for the purpose set forth.

2. A gearing frame of the type set forth comprised of a pair of sheetmetal bars set vertically edgewise and means rigidly spacing andconnecting them together, a gear supporting plate embraced by andengaging said bars, and a gear cover or dome carried by said bars oversaid gear plate, said connecting and spacing means consisting ofseparate plates or bars set vertically edge-wise and having their endsabutted against the inner faces of the frame bars.

3. A gearing frame for ice cream freezers, etc., consisting of a pair ofparallel sheet metal bars set vertically edge-wise and means rigidlyspacing them apart, said spacing and connecting devices affordingbearings for a drive shaft, a plate for supporting the driven gear, saidplate being embraced by and attached to said bars, said connecting andspacing means consisting of separate plates or bars set verticallyedge-wise and having their ends abutted against the inner faces of theframe bars.

I. In an ice cream freezer, the combination of a tub and a gearing frameprovided with a cross bar at its inner end, and a clip provided withopen hinge hooks for engaging said cross bar, said clip being rigidlyand permanently fastened to the rim of the tub and provided with ahook-like extension which engages over and fits down on the upper edgeof the rim and against the inner wall of the tub, thereby rigidlyclasping the rim of the tub.

5. In combination with a tub having notches cut out of its upper edge,of a gearl ing frame having its opposite ends bodily fitting down insaid notches, the sides of the frame abutting the sides of the notchesand l the upper edge of the, frame coming substantially flush with theupper edge of the tub, and means for preventing end-wise movement of theframe on the tub.

6. In combination with a tub having notches cut in its upper ends and ahinge plate fastened to the exterior of the tub below one of the notchesand having hinge hooks terminated below the top edge of the tub, of agearing frame set down in said notches and being constructed at itshinge end for engagement with said hooks.

Z5 7 In combination with a tub having notches cut in its upper edge anda hinge plate fastened to the tub below one of the notches and providedwith open hinge hooks and also with an inward extension fitting againstthe bottom of said notch and extending down against the inner face ofthe tub wall, this extension rigidly clasping the tub, of a gearingframe adapted to fit down in said notches and constructed at its hingeend for engagement with said hooks.

8. In combination with a tub having a pair of notches cut in the rim ofthe tub adjacent to each other, and also with another notch in the rimat a point diametri- 4 cally opposite said two notches, of a gearingframe constructed of a pair of bars set vertically edge-wise, said barsfitting down in said notches and abutting against the sides thereof, andmeans for hinging the frame at one end to the tub.

9. In combination with a tub having its rim provided at one side with apair of notches and at its other side with a wider notch, of a gearingframe comprising parallel bars adapted to fit down in said notches andprovided with a stop adapted to abut against the portion of the staveextending up between the bars of the frame, and means for hinging theframe to the tub at a point adjacent to the aforesaid wide notch, forthe purpose set forth.

10. A gearing frame of the type set forth consisting of a single bar orplate of sheet metal bent. upon itself about midway of its length, thetwo bars thus formed being rigidly connected together by cross-bars andbeing bent outwardly midway of their ends,

a gear supporting plate embraced and engaged by said outwardly bentportions, and

a gear casing or dome embraced by and attached to said outwardly bentportions of the frame bars.

11. A gearing frame for ice-cream freezers, etc., consisting of a pairof parallel metal bars and means rigidly connecting and spacing themapart, said spacing and connecting means affording bearings for thedrive shaft, a plate for supporting a driven gear, said plate beingembraced by and attached to said bars by having its ends tenoned orshouldered into opposite openings in said bars, whereby the securingtogether of the bars locks and supports the plate.

12. A gearing frame consisting of a pair of sheet metal bars setvertically edge-wise and means for rigidly connecting them together andspacing them apart, said means embodying transverse bars or platesprovided with holes for a drive shaft and being tenoned into said framebars, for the purpose set forth.

13. A gearing frame for ice cream freezers, consisting of a pair ofsheet metal frame bars set vertically edge-wise and each being bentoutwardly about mid-Way its length, rigid cross bars connecting theframe bars at each side of the bent portions, the cross bars at one sidebeing provided with alined holes for the drive shaft, a gearing cover ordome seated on the bent portions of the frame bars, and a separategear-supporting plate connecting the said bent portions of the framebars.

14. A gearing frame for ice cream freezers, consisting of a pair ofsheet met-a1 bars set edge-wise vertically and bent outwardly aboutmid-way their ends to form a seat for a cover or dome, means for rigidlyconnecting and spacing the bars, said means affording a bearing for adrive shaft, a cover or dome having its lower edge fastened within theoutwardly bent portions of the bars, and a gear supporting platepositioned under the cover or dome and supported in said outwardly bentportions of the bars.

In testimony whereof I hereunto ailix my signature in the presence oftwo witnesses this 7th day of August, 1908.

MICHAEL A. ROLLMAN.

Witnesses:

JOHN A. HLPPLE, M. N. BRUBAKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

